Roller equipment



Oct. 7, 1958 H. A. CASPARI ErAL ROLLER EQUIPMENT 4 Sheets-Sheet 1 FiledMarch 30, 1953 Oct. 7, 1958 H. A. CASPARI EAL 4,

ROLLER EQUIPMENT Filed March 30, 1953 4 Sheets-Sheet 2 INVAWIUPS;

Oct. 7, 1958 H. A. CASPARI IEI'AL 2, 5 ,7 0

ROLLER EQUIPMENT 4 Sheets-Sheet 3 Filed March 30, 1953 Wye-ms M w 7 6?%Az; .4. 37 h dz a 1 w Oct. 7, 1958' A. CASPARI EI'AL 2,854,700

ROLLER EQUIPMENT Filed larch 30. 19 53 4 Sheets-Shoat 4 INK/0m SMel-Mann V @QJ.

United States Patent ROLLER EQUIPNIENT Hans Albrecht Caspari, Emmaberg,Bremen-Lesum, Fritz Schnebel, Bremen, and Hermann Hene,Bremen-Blumenthal, Germany, assignors to Spinnbau G. in. b. H.,Bremen-Farge, Germany, a German company Application March 30, 1953,Serial No. 345,366 Claims priority, application Germany May 8, 1952 7Claims. (Cl. 19-65) The invention relates to a roller device and is afurther improvement of our co-pending application Ser. No. 339,654 filedMarch 2, 1953 and now abandoned and directed to a roller mechanism forcrushing impurities in card webs.

The problem of equal pressure distribution over the length of therollers of a roller device was solved according to said co-pendingpatent application by supporting each working roller by at least onepressureloaded beam preferably of the same strength of material, thesupporting beam being in engagement with the working roller through apressure transmitting member of the same length as the latter.

In order to compensate for unavoidable constructional inaccuracies andtheoretically possible sagging of the thrust beam, which might influencethe true parallelism of the working rolls during operation, it isproposed to provide hydraulically controllable means for acting throughshoe means upon the working rolls.

According to a preferred form of the invention, a resilient hollow bodyis inserted, in a longitudinal direction, between pressure conveyingshoe means and a supporting beam of a frame. This resilient body isalterable in shape by means of adjustable inside pressure.Advantageously the shoe means is divided up to separate sections.

The hollow body itself consist of tubing closed at one end and formedfrom rubber, synthetic rubber, resilient synthetic material orthin-walled yieldable sheet metal, and has with advantage at the closedend pressure controlling devices, the supply arrangement for thepressure medium being at the open end. The pressure control devices can,however, also be provided directly adjacent the supply system.

According to a further form of the invention, an electric heating devicemay be introduced into the flexible hollow body, in order to obtain in asimple manner a heating of the pressure transmission member, and throughthis of the working rollers, when the material being operated onrequires heat treatment. plurality of fluid pressure controllablemembers'between a supporting beam and the adjacent shoe means, it isadvantageous to connect together the several fluid pressure conveyingmeans of communicating pipes.

It is, however, also possible, for example, to give to the lowerpressure transmission member a definite pressure and to close the same,and only to impart the desired working pressure to the upper pressuretransmission member, using the lower transmission member as an elasticor resilient pad or cushion.

In order to ensure that the working rollers separate from one another ona reduction or cutting off of the elastic pressure, the bearings of theworking rollers may be resiliently connected.

Some ways of carrying out the invention are shown, schematically and byway of example, by the accompanying drawings.

When using a A 2,854,700 Patented Oct. 7, 1958 Figure 1 is a front viewof a roller device according to the invention.

Figure 2 is a plan view of a pressure transmission member dividedthroughout its length.

Figure 3 is a section on the line III-III, Figure 2.

Figure 4 shows a front view of a different form of A roller device.

sure medium to the pressure transmission member.

Figure 10 is a further possible way of supplying the pressure mediumaccording to Figure 9.

Figure 11 shows the bearing arrangement of the working rollers accordingto the invention.

Like references indicate the same parts in the figures.

Similar to the arrangement of our co-pending patent application Ser. No.339,654 and now abandoned, the working rolls 1, 2, with their trunnions3, are rotatably mounted in suitable plain or roller bearings 4, 5,which are adjustably mounted, one above the other, in side members (notshown) of the frame of the roller device, so that they are placed underload. The lower ends of the side members of the frame are flexibly orrigidly connected together by means of a beam 6 of substantially thesame strength throughout its length. Between the working roller 2 andthe supporting beam 6 is provided the pressure transmission member 7,which, according to the invention, consists of a material whose elasticmodulus is smaller than the elastic modulus of the material of theworking roller 2 and of the supporting beam 6. Against the workingroller 1 presses from above the supporting beam 8 on which the requiredbearing pressure operates by way of example by means of interconnectedcylinders 9, 9. The supporting beam 8 is slidable in the side framemembers'(not shown) in a vertical direction. Also, between the beam 8and the working roller 1 is provided a flexible or expansibl e pressuretransmission member 7', formed in the same manner as the alreadymentioned pressure transmission member 7. Suitable elastic materials areplastic, bronze or'the like, whosemoduli of elasticity must comply withthe above mentioned conditions. It is obvious that the elastic formationof the pressure transmission members 7, 7' must be such as to compensatefor any structural inaccuracies and theoretically possible sagging ofthe supporting beams 6, 8. In order further to equalise the distributionof the load elastic pads, such as rubber plates, can also be providedbetween the sup porting beams 6, 8, and the pressure transmittingmembers 7, 7, as shown in Figure l by the broken lines 10, 10'.

Equal pressure distribution may also be obtained by mechanical,hydraulic or pneumatic resilient systems, as shown, for example,schematically in Figure 4. Arranged between the supporting beams 6 8,and the respective pressure transmission members 7,7 are, for example,

individualhydraulic cylinders 11, 11, which are connected bycommunicating conduits l2, 12' with the sup-' ply arrangement, forexample a pump 13, for the pressure medium. Between the pressuretransmission members 7, 7' and the pressure devices 11, 11' intermediatemembers 14, 14, in the form of bars or strips may be provided inaddition. To obtain as far as possible an individualized pressure actionon the pressure transmission members 7, 7 it is advantageous to divideup the pressure transmission members in the longitudinal direction, asat rollers 1, 2 is obtained, if, in the preferred arrangement:

according to Figure, 5, flexible. hollow bodies, for example tubes orpipes. of rubber orthin+walled metal,

which alter in shape according to the. pressure prevailing in, them,areprovided between thesupporting beamsfi, 8 and the pressuretransmission members 7, 7'

Withreference to-Figs, 6 and, 8, it may be stated; that while thepressure means is shown in thesefigpres; for, thetop roll .1; only,itis; to beunderstood that the. pressure means is duplicatedfor the,bottom, roll 2. Asshown in Figures 6 to 8, a closed chamber. 16 ,is-provided err-thesupporting-beam 8, which 'chambermay; be'formed eitherfrom a single profiled bar 17, (Fig; 6-) orfromtwovprofiled: bars 18,1,8f (Figs. 7 and 8;), and in whichisdisplaceable in a verticaldirection the pressure; transmissionlmember 7'; Thetransmission member-7. may be formed either-as a sliding bar (Figure 6 and Figure, 7) or asa rolling body (Figure 8). Inside the. chamber; 16.is theflexible pipeor tubular hollow body 19 which extends. for the full length of theworking roller 1 (Figure The hollow body 19"in the form shown. inFigure. 5a is closedat the right-handlendand there is provided withpressure control devices, namely a pressure gauge 20 and a regulatingvalve 21, by the help of which the filling and pressure of the; pressuremedium in the hollow body- 19 may be condesired, the'hollow body 19-maybe tempered orheated by means of an electrical heating arrangement 24(Fig. 5) fitted in the hollow body preferably at-its closed end, in sucha manner that a desired temperature is communicated to the pressuretransmission member 7'. This arrangement is shown in Figure 5 onthesupporting beam 6.

The arrangements forthesupply of-pressure medium tothe hollow body 19may alsotake other forms. According to- Figure 9; the pistons 25' ofhydraulic cylinders 26; 26' are connected mechanically with screwthreadsof opposite hand, so that rotation of the hand-wheel'28 varies thepressure of the pressure media in the upper and lower hollow bodies 19simultaneously in conformity with the direction in which and to theextent to which the hand wheel 28 is turned.

In the arrangement according to Figure 10, check valves 29, 29 areprovided at the open ends of thehollow bodies 19. The hollow bodies 19areadapted to communicate with the supply pump 31 for thepressuremewdium through the communicating passages 30, The, desired pressurein thehollow bodies19 may, withthis. arrangement, be easily obtained. Amongother thingsthe.

check valve 29 may be so adjusted that the respective hollow body 19will only take a predetermined pressure and will then close, whilst thedesired working pressure is communicated to the working rollers throughthe check valve 29.

In order to make certain that the working rollers 1, 2 follow up adesired pressure reduction in the pressure transmitting members 7, 7',the bearings 32, 32' of the working rollers are innerconnected by aspring 33 (Fig. 11). If the pressure in the pressure transmissionmembers7, 7' alters, the spring 33 ensures that the working rollers areseparated from one another by the required distance.

Flexible pressure transmitting members of the kind described give asensitive adjustment in such a manner that the load is spread evenlyover the entire length of' the;working rollersand any deviations fromthe parallel positions of the working rollers, due to the load or othercircumstances, are compensated for. This has'the result that thesupporting beams 6, 8 may be of a lighter construction, becausetheoretically large deflections are permissible and also largemanufacturing tolerances may be allowed. In this case onemay connectboth supporting beams 6, 8, either movably with the frame Walls of theroller device, or rigidly thereto so so that a vertical slideguide forthe upper supporting beam is no longer necessary.

We claim:

1. In a web squeezer for crushing impurities in card webs comprising: apair of rotatable work rolls mounted in parallelrelationship formovementtoward each other for squeezing a card web between them and means forurging saidrolls toward each other, said urging means comprising shoemeans-extending axially along each of said rolls on the sides outwardlyfrom the mutually contiguous sides thereof andadapted to bearthereagainst, a beam outwardly from and generally parallel to. each/shoemeans, housing means, respectively fixed to each. ofsaid beams andincluding: guiding means gslidably guiding said shoe means, said housingmeans respectively confining with the respective adjacent shoe means alongitudinal chamber with three fixed longitudinalsides and .onemovablelongitudinal sideformed by. thev adjacent shoe means, and aflexible hollow memberv mountedin said longitudinal,chamber betweeneachbeam and. its associated shoe means. and beinglexpansible by-pressurefluidto force said shoemeansaway. from said beam and against itsassociated roll, the shoe means, the beams, the housing means; and thehollow. members beingsubstantially coextensive with the working lengthof said rolls'whereby the. forces thereby exertedv on saidrolls areuniformly distributed; along :the. working length thereof.

2. A web squeezer according. to claim 1, which includes electric heatingmeans mounted within said flexible hollow member-and arranged forconnection with an electric source.- outside said hollowmember.

3. Aaweb squeezer according to-claim: l, in which said shoe meansincludes a-roller contacting theadjacent rolli 4. A web squeezeraccording-to claim 1; in which'the- 5'.- A -web squeezenfor-crushi-ngimpurities in card webs,

which comprises: a pair of rotatable work rolls mounted inparallelrelationship for movement'- toward each other forsqueezing acard-'web'between them'and means' for urging said rolls-towardeachother, said urging means comprising shoe-means extending axiallyalongeach'of said rolls onthe sidesoutwardlyfrom the mutually contiguoussides thereof and adapted to bearthereaga'mst, each of saidshoe meanscomprising a plurality of'aligned. shoe segments, a beamoutwardly'from-andgenerally parallel to each shoe means, housing meansrespectively fixed 'toeach of said'beams and-including guiding meansslidably guidingsaid shoe'means, said'housing means respectivelyconfining with the respective. adjacent shoe means a longitudinalchamber-with three fixed'longitudinal sidesand one movablelongitudinalside formed by v the adjacent shoe means, and a flexible hollow membermounted in said longitudinal'chamber between each beam anditsassociated'shoe means and being expansible by pressure fluid to. force.said shoe meansaway from said beam and against its associated roll, the.shoe-means,

thev beams, the housing means andthe-hollow membersbeing substantiallycoextensivewith the working -length-of'- mounted in parallelrelationship formovement toward each other for squeezing a card webbetween'themand means for urging said rolls toward each other, saidurging means comprising shoe means extending axially along each of saidrolls on the sides outwardly from the mutually contiguous sides thereofand adapted to bear thereagainst, a beam outwardly from and generallyparallel to each shoe means, fluid expansible means mounted between eachbeam and its associated shoe means for forcing said shoe means away fromsaid beam and against its associated roll, the shoe means, the beams,and said fluid expansible means extending substantially over the entireworking length of said rolls whereby the forces thereby exerted on saidrolls are uniformly distributed along the working length thereof.

7. A web squeezer according to claim 6, which includes a pressure fluidsource common to said fluid expansible means, and conduit means arrangedfor connecting said pressure fluid source with each of said fluidexpansible means.

References Cited in the file of this patent UNITED STATES PATENTSFOREIGN PATENTS v Great Britain Aug. 27, 1931

